The use of numerical simulation for the evaluation of special transparent glass resistance

Binar, Tomáš; Švarc, Jiří; Vyroubal, Petr; Kazda, Tomáš; Rolc, Stanislav; Dvořák, Aleš; Dostál, Petr

doi:10.1016/j.engfailanal.2018.04.014

Cited by 6 publications

(4 citation statements)

References 5 publications

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“…The highest velocity occurs at around 40 s, when it reaches a value of slightly over Mach 3. Thereafter, the pressure difference between the two chambers decreases due to pumping, and thus the Mach number gradually decreases (Figure 6) (15,16,17). Figure 6.…”

Section: Resultsmentioning

confidence: 99%

Mathematical and Physical Analysis of Pressure Gradient in the Experimental Chamber for Subsequent Comparison with Optical Methods

Bayer¹,

Maxová²

2021

ECS Trans.

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As a part of the research in the field of pumping vacuum chambers in the Environmental Electron Microscope, a research on supersonic flow through the Appertures is being carried out at the Department of Electrical and Electronic Technology of the Brno University of Technology in cooperation with the Institute of Scientific Instruments of the Czech Academy of Science. This paper deals with the possibility of investigating shock waves using the Shlieren optical method, which allows to observe pressure gradients as the first derivation of pressure.

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Section: Resultsmentioning

confidence: 99%

Mathematical and Physical Analysis of Pressure Gradient in the Experimental Chamber for Subsequent Comparison with Optical Methods

Bayer¹,

Maxová²

2021

ECS Trans.

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“…Their corresponding spatial relations were defined in the component module [ 23 ]. Due to its symmetry, only half of the model needs to be created, which reduces the calculated amount [ 24 , 25 ]. For the second step, material selection, a bilinear isotropic elastoplastic constitutive model was selected for the metal gasket, plate and the yielding pipe, while the constitutive equation of nylon material would base on the strain energy function [ 26 , 27 ].…”

Section: Numerical Simulation Construction Of the Yielding Boltmentioning

confidence: 99%

Section: Numerical Modelmentioning

confidence: 99%

The influence law of eccentric load on the performance of yielding bolt

et al. 2020

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In order to adapt to the high stress and avoid the large deformation in roadways, the pre-stressed yielding bolt has been developed. Prior to the installation of the pre-stressed yielding bolt, boreholes need to be drilled. However, not all boreholes are perpendicular to the surface of the roadway, and the non-perpendicular holes make the pre-stressed yielding bolt exposed to eccentric loads. In order to reveal the influence of the eccentric load on the performance of the pre-stressed yielding bolt, some numerical simulations were carried out in this study. The influence of the eccentric load on the displacement–load relations, utilization rate of the yielding pipe, the plastic strains of the bolt components as well as the evolution of the absorptive capacity of the yielding pipe were analysed. The results are as follows: (i) eccentric loads affected the utilization rate of the yielding pipe, plastic strains of bolt components and the absorptive capacity was quite great when displacement was less than 2 mm, while these impacts could be neglected when displacement is greater than 2 mm; (ii) as the eccentric load increased, the yielding point and its corresponding displacement increased linearly while the yielding magnitude decreased linearly; and (iii) the eccentric load could be adjusted to control the yielding point and magnitude in order to meet the roadway support's requirement for the yielding bolt.

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“…Sukac et al [2] in their work have dealt with the impact of climatic conditions, temperature and relative air humidity on the occurrence of material corrosion with consequent influence on the military unit economics. Other research projects investigating the influence of temperature on military material were presented in the literature [3,4]. The properties of military clothing significantly affect the properties of the materials from which they are made.…”

Section: Introductionmentioning

confidence: 99%

A comparison of methods for measuring thermal insulation of military clothing

Švecová

Strohmandl

Fišer

et al. 2019

Journal of Industrial Textiles

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This study presents methods for measuring thermal insulation of military clothing assemblies used in various climatic regions of the world, with the exception of polar regions. With the use of FOX 314 and thermal manikin, the thermal insulation of the fabrics (military materials) was ascertained at simulating real climatic conditions of cold, arid, temperate and tropical zones according to European standard EN 60721-2-1: 2014. The aim of this study was to compare the values of thermal insulation of the duty of military clothing ascertained by two methods and to evaluate the reliability of methods and instruments used. The measured results show that the measurement methods used are different in terms of method and measurement conditions, the results of the thermal insulation and the resulting choice of military clothing in the type of climate. The functionality and suitability of the use of military clothing sets were verified in real climatic conditions, provided that the optimal thermal comfort of the wearer was achieved.

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The use of numerical simulation for the evaluation of special transparent glass resistance

Cited by 6 publications

References 5 publications

Mathematical and Physical Analysis of Pressure Gradient in the Experimental Chamber for Subsequent Comparison with Optical Methods

Mathematical and Physical Analysis of Pressure Gradient in the Experimental Chamber for Subsequent Comparison with Optical Methods

The influence law of eccentric load on the performance of yielding bolt

A comparison of methods for measuring thermal insulation of military clothing

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